Re: DropDownChoice with Model for data and HashMap of key/values
After a fresh start on a Monday, I figured out how to use a Hashmap in
a DropDownChoice component when separate id/display values are
required. I was hoping to get a bit more of an explicit answer from
the community on this one though, since I was completely stumped,
which is what I thought this mailing list was for. Anyway, its solved:
final LinkedHashMap preferences = new LinkedHashMap();
preferences.put(0, some choice);
preferences.put(1, some other choice);
preferences.put(2, and another choice);
IModel dropDownModel = new Model() {
public Object getObject() {
return new ArrayList(preferences.keySet());
}
};
DropDownChoice profileChoice = new DropDownChoice(preference,
dropDownModel, new IChoiceRenderer() {
public String getDisplayValue(Object object) {
return preferences.get(object);
}
public String getIdValue(Object object, int index) {
return object.toString();
}
});
I am using a CompoundPropertyModel for my form where the CPM has the
property 'preference', so no need to explicitly tie the two together
in the DDC.
Hopefully this will help others.
cheers,
Steve
On 12 Dec 2008, at 18:39, Igor Vaynberg wrote:
that map needs to be in the choicerenderer. your domain model type is
integer, ddcinteger looks like this:
dropdownchoice(string id, imodelinteger model, imodellistinteger
choices, ichoicerendererinteger renderer)
-igor
On Fri, Dec 12, 2008 at 10:36 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Thanks.
I now have this:
IModel dropDownModel = new Model() {
protected Object load() {
preferences.put(0, some choice);
preferences.put(1, some other choice);
preferences.put(2, and another choice);
return preferences; //get the HashMap
}
};
DropDownChoice profileChoice = new DropDownChoice(profile,
dropDownModel,
new IChoiceRenderer() {
public String getDisplayValue(Object object) {
return preferences.get(object);
}
public String getIdValue(Object object, int index) {
return object.toString();
}
});
where my Form is given a CompoundPropertyModel with one of the
parameters
being profile. But, I'm getting an error about my choices being
null.
java.lang.NullPointerException: List of choices is null - Was the
supplied
'Choices' model empty?
I can feel I'm close but what have I missed?
cheers,
Steve
On 12 Dec 2008, at 18:14, Igor Vaynberg wrote:
new ichoicerendererinteger() {
Object getDisplayValue(integer object) {
return choices.get((integer)object);
}
String getIdValue(integer object, int index) {
return object.tostring();
}
}
-igor
On Fri, Dec 12, 2008 at 9:46 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Hi all,
I've been over all the DDC examples but am still stumped by this
one. I have
a model (pojo) which holds user preferences, the preference for
each item
being an Integer.
ie
public class UserPreferences {
int preferenceOne;
int preferenceTwo
constructor
getters and setters for the ints above
}
I now want to render a form that has a DDC for each of the
preferences in my
model. The list of choices that needs to go into the DDC should
come from a
HashMap or similar (in reality it will come from a database)
because I want
to store the number attached to the item selected, not the display
string.
ie
LinkedHashMap choices = new LinkedHashMap()
choices.put(43, Something);
choices.put(64, Something else);
choices.put(87, blah);
which should render the select list as:
select name=preferenceOne
option value=43Choice Something/option
option value=64Choice Something else/option
option value=87blah/option
select
When clicking submit, the value (ie 43) should be attached to the
relevant
item in the Model (ie preferenceOne would be 43), then I can save
it to the
database.
Everything I've tried with ChoiceRenderer etc seems to get mixed up
with the
different data models etc.
Can someone please present a snippet of code on how to do this, I'm
at my
wits end. I cannot for the life of me find any explicit info
separating the
models/data as above.
thanks,
Steve
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Re: DropDownChoice with Model for data and HashMap of key/values
On Mon, Dec 15, 2008 at 6:02 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
After a fresh start on a Monday, I figured out how to use a Hashmap in a
DropDownChoice component when separate id/display values are required. I was
hoping to get a bit more of an explicit answer from the community on this
one though, since I was completely stumped, which is what I thought this
mailing list was for.
keep in mind that there are 5 of us and 400 of you. i believe i gave
you more then enough of a push in the right direction to solve the
problem. and looks like you did.
-igor
Anyway, its solved:
final LinkedHashMap preferences = new LinkedHashMap();
preferences.put(0, some choice);
preferences.put(1, some other choice);
preferences.put(2, and another choice);
IModel dropDownModel = new Model() {
public Object getObject() {
return new ArrayList(preferences.keySet());
}
};
DropDownChoice profileChoice = new DropDownChoice(preference,
dropDownModel, new IChoiceRenderer() {
public String getDisplayValue(Object object) {
return preferences.get(object);
}
public String getIdValue(Object object, int index) {
return object.toString();
}
});
I am using a CompoundPropertyModel for my form where the CPM has the
property 'preference', so no need to explicitly tie the two together in the
DDC.
Hopefully this will help others.
cheers,
Steve
On 12 Dec 2008, at 18:39, Igor Vaynberg wrote:
that map needs to be in the choicerenderer. your domain model type is
integer, ddcinteger looks like this:
dropdownchoice(string id, imodelinteger model, imodellistinteger
choices, ichoicerendererinteger renderer)
-igor
On Fri, Dec 12, 2008 at 10:36 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Thanks.
I now have this:
IModel dropDownModel = new Model() {
protected Object load() {
preferences.put(0, some choice);
preferences.put(1, some other choice);
preferences.put(2, and another choice);
return preferences; //get the HashMap
}
};
DropDownChoice profileChoice = new DropDownChoice(profile, dropDownModel,
new IChoiceRenderer() {
public String getDisplayValue(Object object) {
return preferences.get(object);
}
public String getIdValue(Object object, int index) {
return object.toString();
}
});
where my Form is given a CompoundPropertyModel with one of the parameters
being profile. But, I'm getting an error about my choices being null.
java.lang.NullPointerException: List of choices is null - Was the supplied
'Choices' model empty?
I can feel I'm close but what have I missed?
cheers,
Steve
On 12 Dec 2008, at 18:14, Igor Vaynberg wrote:
new ichoicerendererinteger() {
Object getDisplayValue(integer object) {
return choices.get((integer)object);
}
String getIdValue(integer object, int index) {
return object.tostring();
}
}
-igor
On Fri, Dec 12, 2008 at 9:46 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Hi all,
I've been over all the DDC examples but am still stumped by this one. I have
a model (pojo) which holds user preferences, the preference for each item
being an Integer.
ie
public class UserPreferences {
int preferenceOne;
int preferenceTwo
constructor
getters and setters for the ints above
}
I now want to render a form that has a DDC for each of the preferences in my
model. The list of choices that needs to go into the DDC should come from a
HashMap or similar (in reality it will come from a database) because I want
to store the number attached to the item selected, not the display string.
ie
LinkedHashMap choices = new LinkedHashMap()
choices.put(43, Something);
choices.put(64, Something else);
choices.put(87, blah);
which should render the select list as:
select name=preferenceOne
option value=43Choice Something/option
option value=64Choice Something else/option
option value=87blah/option
select
When clicking submit, the value (ie 43) should be attached to the relevant
item in the Model (ie preferenceOne would be 43), then I can save it to the
database.
Everything I've tried with ChoiceRenderer etc seems to get mixed up with the
different data models etc.
Can someone please present a snippet of code on how to do this, I'm at my
wits end. I cannot for the life of me find any explicit info separating the
models/data as above.
thanks,
Steve
-
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Re: DropDownChoice with Model for data and HashMap of key/values
new ichoicerendererinteger() {
Object getDisplayValue(integer object) {
return choices.get((integer)object);
}
String getIdValue(integer object, int index) {
return object.tostring();
}
}
-igor
On Fri, Dec 12, 2008 at 9:46 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Hi all,
I've been over all the DDC examples but am still stumped by this one. I have
a model (pojo) which holds user preferences, the preference for each item
being an Integer.
ie
public class UserPreferences {
int preferenceOne;
int preferenceTwo
constructor
getters and setters for the ints above
}
I now want to render a form that has a DDC for each of the preferences in my
model. The list of choices that needs to go into the DDC should come from a
HashMap or similar (in reality it will come from a database) because I want
to store the number attached to the item selected, not the display string.
ie
LinkedHashMap choices = new LinkedHashMap()
choices.put(43, Something);
choices.put(64, Something else);
choices.put(87, blah);
which should render the select list as:
select name=preferenceOne
option value=43Choice Something/option
option value=64Choice Something else/option
option value=87blah/option
select
When clicking submit, the value (ie 43) should be attached to the relevant
item in the Model (ie preferenceOne would be 43), then I can save it to the
database.
Everything I've tried with ChoiceRenderer etc seems to get mixed up with the
different data models etc.
Can someone please present a snippet of code on how to do this, I'm at my
wits end. I cannot for the life of me find any explicit info separating the
models/data as above.
thanks,
Steve
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
Re: DropDownChoice with Model for data and HashMap of key/values
Thanks.
I now have this:
IModel dropDownModel = new Model() {
protected Object load() {
preferences.put(0, some choice);
preferences.put(1, some other choice);
preferences.put(2, and another choice);
return preferences; //get the HashMap
}
};
DropDownChoice profileChoice = new DropDownChoice(profile,
dropDownModel, new IChoiceRenderer() {
public String getDisplayValue(Object object) {
return preferences.get(object);
}
public String getIdValue(Object object, int index) {
return object.toString();
}
});
where my Form is given a CompoundPropertyModel with one of the
parameters being profile. But, I'm getting an error about my choices
being null.
java.lang.NullPointerException: List of choices is null - Was the
supplied 'Choices' model empty?
I can feel I'm close but what have I missed?
cheers,
Steve
On 12 Dec 2008, at 18:14, Igor Vaynberg wrote:
new ichoicerendererinteger() {
Object getDisplayValue(integer object) {
return choices.get((integer)object);
}
String getIdValue(integer object, int index) {
return object.tostring();
}
}
-igor
On Fri, Dec 12, 2008 at 9:46 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Hi all,
I've been over all the DDC examples but am still stumped by this
one. I have
a model (pojo) which holds user preferences, the preference for
each item
being an Integer.
ie
public class UserPreferences {
int preferenceOne;
int preferenceTwo
constructor
getters and setters for the ints above
}
I now want to render a form that has a DDC for each of the
preferences in my
model. The list of choices that needs to go into the DDC should
come from a
HashMap or similar (in reality it will come from a database)
because I want
to store the number attached to the item selected, not the display
string.
ie
LinkedHashMap choices = new LinkedHashMap()
choices.put(43, Something);
choices.put(64, Something else);
choices.put(87, blah);
which should render the select list as:
select name=preferenceOne
option value=43Choice Something/option
option value=64Choice Something else/option
option value=87blah/option
select
When clicking submit, the value (ie 43) should be attached to the
relevant
item in the Model (ie preferenceOne would be 43), then I can save
it to the
database.
Everything I've tried with ChoiceRenderer etc seems to get mixed up
with the
different data models etc.
Can someone please present a snippet of code on how to do this, I'm
at my
wits end. I cannot for the life of me find any explicit info
separating the
models/data as above.
thanks,
Steve
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
smime.p7s
Description: S/MIME cryptographic signature
Re: DropDownChoice with Model for data and HashMap of key/values
that map needs to be in the choicerenderer. your domain model type is
integer, ddcinteger looks like this:
dropdownchoice(string id, imodelinteger model, imodellistinteger
choices, ichoicerendererinteger renderer)
-igor
On Fri, Dec 12, 2008 at 10:36 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Thanks.
I now have this:
IModel dropDownModel = new Model() {
protected Object load() {
preferences.put(0, some choice);
preferences.put(1, some other choice);
preferences.put(2, and another choice);
return preferences; //get the HashMap
}
};
DropDownChoice profileChoice = new DropDownChoice(profile, dropDownModel,
new IChoiceRenderer() {
public String getDisplayValue(Object object) {
return preferences.get(object);
}
public String getIdValue(Object object, int index) {
return object.toString();
}
});
where my Form is given a CompoundPropertyModel with one of the parameters
being profile. But, I'm getting an error about my choices being null.
java.lang.NullPointerException: List of choices is null - Was the supplied
'Choices' model empty?
I can feel I'm close but what have I missed?
cheers,
Steve
On 12 Dec 2008, at 18:14, Igor Vaynberg wrote:
new ichoicerendererinteger() {
Object getDisplayValue(integer object) {
return choices.get((integer)object);
}
String getIdValue(integer object, int index) {
return object.tostring();
}
}
-igor
On Fri, Dec 12, 2008 at 9:46 AM, Steve Swinsburg
s.swinsb...@lancaster.ac.uk wrote:
Hi all,
I've been over all the DDC examples but am still stumped by this one. I have
a model (pojo) which holds user preferences, the preference for each item
being an Integer.
ie
public class UserPreferences {
int preferenceOne;
int preferenceTwo
constructor
getters and setters for the ints above
}
I now want to render a form that has a DDC for each of the preferences in my
model. The list of choices that needs to go into the DDC should come from a
HashMap or similar (in reality it will come from a database) because I want
to store the number attached to the item selected, not the display string.
ie
LinkedHashMap choices = new LinkedHashMap()
choices.put(43, Something);
choices.put(64, Something else);
choices.put(87, blah);
which should render the select list as:
select name=preferenceOne
option value=43Choice Something/option
option value=64Choice Something else/option
option value=87blah/option
select
When clicking submit, the value (ie 43) should be attached to the relevant
item in the Model (ie preferenceOne would be 43), then I can save it to the
database.
Everything I've tried with ChoiceRenderer etc seems to get mixed up with the
different data models etc.
Can someone please present a snippet of code on how to do this, I'm at my
wits end. I cannot for the life of me find any explicit info separating the
models/data as above.
thanks,
Steve
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
-
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